I wasn’t there when you pulled the PV out, so I can’t say for sure...... but......

It’s unlikely you had 2 gaskets under the PV.
The PV gasket is double thick, two pieces glued together....... and used ones often split apart when you pull the PV out...... and it seems like there’s two gaskets there.

The correct thickness is about .065”.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads